The number of unemployment claims jumped to 429,000 last week, an unexpected rise that led the Dow Jones industrial average to fall below 12,000. Falling oil prices—they decreased 5% today—also drove US stocks lower, the AP reports. The Dow was down recently more than 215 points, while the Standard & Poor's 500 index was down 21 points and the Nasdaq had dropped 29 points. The rise in unemployment claims is the largest in four weeks. (More unemployment stories.)